Re: [Flightgear-devel] CH53 main rotor not producing any torque.
On Tuesday 04 July 2006 20:28, Josh Babcock wrote: chris wrote: The main shaft on the D model sees about 3 million inchlb of torque. I do not have the number for the super stallion. Is that at 0 deg pitch? I can extrapolate the torque for the e model by multiplying that by 7/6 since they use the same blades and (I believe) have the same rotor RPM. The only difference is the number of blades. That was at max power. I can not find in my old notes what flat pitch torque was. Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] CH53 main rotor not producing any torque.
On Tue, 4 Jul 2006, Josh Babcock wrote: This helo def does not seem to be producing any main rotor torque. Adjust the poweratpitch_0 parameter. (on tail rotor too) Those seven 11m long blades probably cost a bit more than 53kW to turn at 185 rpms even at zero pitch. =) But where do one find real data for that? :P Checklists perhaps? -- torque readouts on the panel during start up procedures? Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] CH53 main rotor not producing any torque.
Joacim Persson wrote: On Tue, 4 Jul 2006, Josh Babcock wrote: This helo def does not seem to be producing any main rotor torque. Adjust the poweratpitch_0 parameter. (on tail rotor too) Those seven 11m long blades probably cost a bit more than 53kW to turn at 185 rpms even at zero pitch. =) But where do one find real data for that? :P Checklists perhaps? -- torque readouts on the panel during start up procedures? Well, I don't have any data for that number, and haven't played with it yet. 53 Kw is a lot of power though, more than enough to run a house, and the blades shouldn't have that much drag at 0 pitch. The 9800 Kw at full power came from the 100% rating of all the engines running together. I have the POH, and eventually will be tuning number to normal operating ranges and comparing them against power checklists. Josh Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] CH53 main rotor not producing any torque.
On Tuesday 04 July 2006 19:43, Josh Babcock wrote: Joacim Persson wrote: On Tue, 4 Jul 2006, Josh Babcock wrote: This helo def does not seem to be producing any main rotor torque. Adjust the poweratpitch_0 parameter. (on tail rotor too) Those seven 11m long blades probably cost a bit more than 53kW to turn at 185 rpms even at zero pitch. =) But where do one find real data for that? :P Checklists perhaps? -- torque readouts on the panel during start up procedures? Well, I don't have any data for that number, and haven't played with it yet. 53 Kw is a lot of power though, more than enough to run a house, and the blades shouldn't have that much drag at 0 pitch. The 9800 Kw at full power came from the 100% rating of all the engines running together. I have the POH, and eventually will be tuning number to normal operating ranges and comparing them against power checklists. The main shaft on the D model sees about 3 million inchlb of torque. I do not have the number for the super stallion. Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] CH53 main rotor not producing any torque.
Hi Josh, yes, it's a bug. on variable is not initialized, and therefore this effect can happen (depending on compiler and the situation in the memory). Please add _no_torque=0; to Rotor::Rotor() in source/src/FDM/YASim/Rotor.cpp (it's the first function in the file) ...and increase forceatpitch_a for the tail-rotor. Maik Josh Babcock schrieb: Maik, This helo def does not seem to be producing any main rotor torque. I commented out the tail rotor, and no spinning. Turning notorque on or off seems to make no difference. I was originally clued in when I noticed that whatever changes I made to the file I always seemed to have the tail rotor at about zero pitch. Any idea what is wrong here? Josh Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] CH53 main rotor not producing any torque.
chris wrote: The main shaft on the D model sees about 3 million inchlb of torque. I do not have the number for the super stallion. Is that at 0 deg pitch? I can extrapolate the torque for the e model by multiplying that by 7/6 since they use the same blades and (I believe) have the same rotor RPM. The only difference is the number of blades. Josh Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] CH53 main rotor not producing any torque.
Maik Justus wrote: Hi Josh, yes, it's a bug. on variable is not initialized, and therefore this effect can happen (depending on compiler and the situation in the memory). Please add _no_torque=0; to Rotor::Rotor() in source/src/FDM/YASim/Rotor.cpp (it's the first function in the file) ...and increase forceatpitch_a for the tail-rotor. Maik Josh Babcock schrieb: Maik, This helo def does not seem to be producing any main rotor torque. I commented out the tail rotor, and no spinning. Turning notorque on or off seems to make no difference. I was originally clued in when I noticed that whatever changes I made to the file I always seemed to have the tail rotor at about zero pitch. Any idea what is wrong here? Josh Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel OK, much better. I knew about this bug, but for some reason I though it was usually intermittent. My problem happens every time, and I got it into my head that this was something different. Josh Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
